I ran into an odd thing today. My backup during shutdown has seemed slower than usual lately, with a larger mydata.tgz than I usually have. When I checked System Stats bigHomeFile there were three 1M Facebook files in the .mozilla/firefox/57qtynf6.default/storage/temporary directory. I don't know if this was the result of some abnormal exit from Facebook or if Facebook is trying to pull something (in light of recent revelations I admit to a certain paranoia about the good intentions of Facebook, Google, Microsoft, etc.). Anybody else ever see something like this (with Facebook or anything else)?
Also the recent versions of Firefox seem to inflate the mydata.tgz file too, but that's a separate issue.